<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表标签</title>
</head>

<body>
    <div>
        <ul>
            <li>咖啡</li>
            <li>茶
                <ul>
                    <li>红茶</li>
                    <li>绿茶
                        <ul>
                            <li>中国</li>
                            <li>非洲</li>
                        </ul>
                    </li>
                </ul>
            </li>
            <li>牛奶</li>
        </ul>
    </div>
</body>

</html>